Just an update...I bought the pack of 10 THC MJ test strips on Amazon and used one today. The control line came in nicely bold and bright so I know it was working but my second "test" line came up faint/weak, which is a step up from my last test where I didn't even get a faint 2nd line. So does that mean I'm in the clear or just about in the clear? I guess I'll keep testing myself every other day until that 2nd line gets bolder.